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Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add $8$ and $7$, then multiply by $2$” as $2 \times (8 + 7)$. Recognize that $3 \times (18932 + 921)$ is three times as large as $18932 + 921$, without having to calculate the indicated sum or product.


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